Malicious PDF — malware analysis report

Static analysis result for SHA-256 011ac2e708d6b5c7…

MALICIOUS

PDF

94.8 KB Created: 2021-08-04 07:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a931c28eb9ff6f493ecd4d4d366733b5 SHA-1: fb47d2edfd37e8728768039cd66a785d8d36956b SHA-256: 011ac2e708d6b5c7dac9a3f59075be8fdd02eb4a37c1322e423fd2cb368c39af
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of external URIs and link farm heuristics strongly supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://smidgel.ru/uplcv?utm_term=veer+zaara+full+movie PDF link annotation
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/8a34abaa08f13165e76f41fd589e0aab/17433978893.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/3235757613.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/89560532829.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/69630026042.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a8749ba4a---benonesexaripadimes.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-2/20210502200438401820.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/e57e0341c8f47b6bce3b653e5a541768/wemarodosixowok.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a24a095df---39428339881.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/doresomovamogagaripodi.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4fae108ee4---fofopelufe.pdfIn PDF document text
    • https://tangentemag.com/img/file/tefezodugope.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/zesemevuzedesutizaluj.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a27e45f2a---70088538897.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0980616001619772547.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608597b373176---pulexidixibekalani.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/25915830842.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/wevazi.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/fadopebinodelolisubo.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/suzose.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/batup.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca5758eede---57695849143.pdfIn PDF document text
    • http://tele-fonika.pl/upload/file/zukotekopab.pdfIn PDF document text
    • http://ktcz.eu/files/files/wanosudage.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ivhphvts03js66vpcvjbnva2e5/xigapulosiwekune.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF960 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11177 10200 bytes
SHA-256: a88a4d6e0d15b024c17fb8d9923ad091862c0e3a4a13bebca3294252bd849e5e
font_02_sfnt_off00012856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12856 16192 bytes
SHA-256: e2ad764752cd4be5999c18614362e0cea8e9c563e7196d76fd0086f860ccaf5d
font_03_sfnt_off00013ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DDF 17936 bytes
SHA-256: c4cf3982cf43465d88c2b489472e3c97cfc3df51b5a462b109459d50cf3a69df

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